I totally agree that for long non-stop cruise flight is difficult to make electric airplane comparable with Rotax. Fuel has much higher energy density - that is fact.The current tech give about 203w/kg, but there's about 6 different new tech in lab currently. Future will be good. But the concept of motorglider is the key here. Planning for cross country flight, just go with gaz. 1800w is way ahead of any batt and by the time you kill a brand new Rotax at 17k, you will had spend 60k for 2 full pack of battery. As they discharge and the 2hr flight you got at first became 1hr and less.. Pipistrel is the best example.
=some interesting conclusiones... (L/D !)
-AHOI, Martin !
Making the tail-boom with iron rich material and wrapped in copper wire will allow inductance while flying between high tension power lines enabling recharging while airborne. Added benefit is pilots will be "wide eyed" and alert.
Longer wing extensions for Phoenix? Like this 17 m version?Indeed Martin, your bird is quite one of the best and i'm all in electric. I'm working for a duct fan project to fit a sailplane too. 3kw, plenty for the mission of going up 2 times for the day.
Also, did you plan for any wing extension on the Phoenix ?